Door opening and shutting device for automobiles



May 19, 19%; Y K. NAGAO 3,06,483

DOOR OPENING AND SHU'ITING DEVICE FOR AUTOMOBILES- Filed Dec. 14, 1.928

Patented May 19, 1931 PATENT OFFICE KIKUBO NAGAO, O l" KAMISONOCHO,NISHIKU, NiAGOYA, JAPAN noon ormmre m) snur'rmo nmon roa no'romonmns'Application filed December 14, 1928, Serial No. 328,104, and; in JapanJanuary 86, 1928.

This invention relates to a door opening and shutting device for anautomobile. Though of a comparatively simple construction, the deviceaccording to the present invention enables the driver to open and shut,

the doors for the passengers seats surely without leaving his seat,thereby preventing various accidents that may occur owing to thepassenger carelessly opening the door while the car is moving.

In the accompanying drawings, Fig. 1 shows a side view with partialsections of a car in which the device according to the present inventionis em loyed. Fig. 2 shows a side detailed view 0 said device and Fig.

3 is a plan of the same.

Asector (3) is fixed to the end of the lower extension of the doorsupportin axis (2) hinged to the car body. One en of a 0 connecting rod(6) is pivoted to a link 6 which is eccentrically connected-to a sector(4) which is in mesh with said sector 3 and the other end is connectedto a pedal 5 under the drivers seat through a crank.

box' (7 is provided under the floor and, throu h it, the connecting rod(6) with a disk 8) attached thereto can move in the reverse directionswhile compressing or releasing the spring (9) which is contained in 39said box and bears against the disk (8).

Another pedal (15) provided near the pedal (5) is connected to a lockingbolt (11) through suitable transmitting mechanisms such as connectingrods (13) and (14), a

crank (12) and two other cranks. The crank (12) the locking bolt (11)and most part of the connectin rod (13) are contained inside the carame. Said locking bolt (11) tends to protrude outward under the actionof a spring and is made so as to fit into the corresponding recess (10)provided at the side edge of the door (1) so as to lock the latter.

The functions of .the present device are as follows:

Suppose the door (1) is in the opened position as shown in the dottedlines in Fig. 3. Push the pedal (,5) downward, and then the connectmgrod (6) will be moved backward while compressing the spring (9) with thedisk (8), and the sectors (4) and (3) will be rotated into the full lmeposition in Fi 3, whereby the door (1) will be shut t rough the rotationof the supportin axis (2).

he side edge of the door (1) will compel, before'completely being shut,the bolt (11) to recede against the action of its associated spring, andagain permit it to pro- -trude and fit into the correspondin recess (10)so as to lock the door (1) in t e completely shut position. While thedoor (1) is closed, the spring (9) remains in a compressed state and thepedal (5% remains in a depressed state as shown in i 1.

To open the door 1), push the pedal (15) downward, and the locking bolt(11) will come out of the engagement with the recess (10) through themovements of the transmitting mechanisms such as (14) (13) (12 7comHpressed during the closin of the door.

aving now particularly ascribed and ascertained the nature of my saidinvention, and in what manner the same is to be performed, I declarethat what I claim is:

1. An automobile having front and rear 85 seats and a rear hinged door,a bolt for locking the door, said bolt being mounted in the automobilebody so as not to be accessible to an occupant of the rear seat, meansfor operating the bolt by the operator on the front seat, a toothedsector on the pivot of the door, a second toothed sector ad'aoent thefirst sector and meshing therewith, a pedal adjacent the front seat,

a hinged rod connected with the said pedal and eccentrically connectedwith the second sector, a spring on the rod, and means whereby thespring is put under compression in closing the door and held compressed1 while the door is closed, thereby permitting the door to be opened bythe spring when the locking bolt is retracted.

2. An automobile having a pivoted door,

a bolt for locking the door closed, a toothed sector on the plvot of thedoor, a second toothed sector mounted ad'acent the first sector andmeshin casing, a rod assmg through the casing and having its ront endconnected with the pedal and its rear end connected to a link, said linkbeing eccentrically connected to the second sector, a spring on the rodin the casing, and a disk on the rod in the casing and against which thes ring bears whereb the sprin will be hel compressed when t e door is cosed by thepedal to permit the, door to be opened by the spring when thebolt is disengaged from the door.

' sector, and a spring interposed between said signature.

v.3. The combination 'wlth an automobile body, a door hinged to the bodhaving a recess for supporting the locking bolt, a sector fixed to theend of the lower extension of the door supporting axis, a pedal mountedon the body and operatively connected to the lock bolt through cranksand connecting rods, a sector in mesh with said first-named sector, asecond pedal mounted on the bod a box attached to the floor of theautomo ile, a piston slidable therein and having a connecting rodprojecting through opposite ends of said box, one end of said rod beingconnected to said second pedal, a

link connected to the other end of said rod and providing a hinge joint,said li bein eccentrically connected to said end name piston and one endof said box.

In testimony whereof I hereunto afix my therewlth, a pedal, a

